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A ray of light is incident on the surfaces of a spherical glass paper- weight making an angle a with the normal and is refracted in the medium at an angle B. calculate the deviation.

Answer» <html><body><p></p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :Deviationn <a href="https://interviewquestions.tuteehub.com/tag/means-1091780" style="font-weight:bold;" target="_blank" title="Click to know more about MEANS">MEANS</a> the angle through while the incident ray is turned in emerging from the medium. In figure if AB and DE are the incident and emergent rays respectively, the deviation will be `<a href="https://interviewquestions.tuteehub.com/tag/delta-947703" style="font-weight:bold;" target="_blank" title="Click to know more about DELTA">DELTA</a>.` <br/> <img src="https://doubtnut-static.s.llnwi.net/static/physics_images/AKS_DOC_OBJ_PHY_XII_V02_A_C02_SLV_029_S01.png" width="80%"/> <br/> Now as at B `<a href="https://interviewquestions.tuteehub.com/tag/anglei-2426677" style="font-weight:bold;" target="_blank" title="Click to know more about ANGLEI">ANGLEI</a>= angle a and angler= B` <br/> So from Snell.s law `I sin a= mu sin B`........(1) <br/> Now from geometry of figure at D, `anglei= beta` <br/> So `mu sin beta= 1 sin gamma` <br/> Comparing Eqs. (1) and (2) `gamma = alpha` <br/> Now as in a triangle exterior angle is the sum of remaining two interior angles in `Delta ABCD`, <br/> `delta (a-B)+(a-B)=2(a-B)`</body></html>


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